USB sound cards

I just want to know something, when using a voice communication program like skype, vent and mumble my mic makes a faint buzzing like noise. I know it's not my headset because it did it for my old one and I thought that's what was causing it so I bought a really nice mic and its still doing it. So I was just wondering if I bought a USB sound card for my PC not a laptop would it work / possibly fix this problem? If a USB one won't work should I get a PCI one? Any help would be much appreciated!

It's feasible that you do have a problem with your audio card jacks and if so, a USB sound card would fix the problem. You can find some cheap stereo USB audio adapters online, so it might be worth a shot, especially if you're confident it's not your headset.

Out of the dozen+ computers I've had over the years, I've actually had issues with the audio jacks I think 3 times now. One was a bad mic jack, another had a bad audio input jack, and the third just developed static over time. A few years back I started using USB headsets for voice chat and have stuck with it. Plus one nice benefit of USB audio is that it shows up as a separate sound device in Windows, so I can keep my game audio configured to use my speakers, and use the USB headset strictly with Vent/Skype/etc. Or pipe everything to the headset, depending on what I'm doing; the option is nice to have.